How conservative the Japanese people really is? And the government?

This is a very vague question. But considering the asker’s comment on Mr. Nakajima’s answer, your interest seems to be in sex-related matters (I don’t think it’s the only indicator of conservative/ progressive, though).

In the old era, gay relationships were very common and were even praised among the privileged social classes, such as Samurai and monks.

They don’t tease or beat up cross-dressed people on the road.

How is TikTok able to censor porn?

Visual-kei

Moreover, buff guys are often avoided for their narcissism.

I’ve heard it’s always the male side that is expected to take a move in some countries. It’s not the case in Japan.

Why do people mourn when their leaders lose elections? Is it common for people to cry over events that are out of their control?

Yaoi

They don’t have the value that “guys must be macho.”

They were very similar to the bromance of today but accompanied by sexual intercourse.

What's the hardest part about marriage that no one ever talks about?

It’s very common for a girl/ woman to ask a boy/ man to be her boyfriend.

They don’t bring around their mates everywhere, which means they don’t worry about being single, gay, or whatever because no one cares about whom others are having/ not having sex with.

They don’t have the so-called “couple culture” seen in many Western countries.

Newspaper headlines: 'A generation let down' and 'Israel claims control' - BBC

How do you see these below?

“None of my business” is the common attitude.

We don’t instantly tie it with sex when a father and his very young daughter are taking a bath together.

Do women like men who have slept with many women?

I sometimes feel people from the West are obsessed with those “gender” and “sex” things too much. Let’s think about something else sometimes. It’s unhealthy.